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package Data::TableReader::Decoder::Mock;
use Moo 2;
use Carp 'croak';
use IO::Handle;
require MRO::Compat if $] < '5.010';
extends 'Data::TableReader::Decoder';
# ABSTRACT: Decoder that returns supplied data without decoding anything
our $VERSION = '0.021'; # VERSION
sub BUILDARGS {
my $args= $_[0]->next::method(@_[1..$#_]);
# back-compat with earlier versions
$args->{datasets}= delete $args->{data} if defined $args->{data};
# allow simple way for user to specify a single table
$args->{datasets}= [ delete $args->{table} ] if defined $args->{table};
$args;
}
has datasets => ( is => 'rw', isa => \&_arrayref_3_deep );
*data= *datasets;
sub _arrayref_3_deep {
ref $_[0] eq 'ARRAY' or return 'Not an arrayref';
return undef unless @{$_[0]};
ref $_[0][0] eq 'ARRAY' or return 'Not an arrayref of tables';
return undef unless @{$_[0][0]};
ref $_[0][0][0] eq 'ARRAY' or return 'Not an arrayref of tables of rows';
return undef unless @{$_[0][0][0]};
ref $_[0][0][0][0] ne 'ARRAY'
or return 'Expected plain cell value at ->[$dataset][$table][$cell] depth of arrayrefs';
undef;
}
sub iterator {
my $self= shift;
my $data= $self->datasets;
my $table= $data->[0];
my $rowmax= $table? $#$table : -1;
my $row= -1;
Data::TableReader::Decoder::Mock::_Iter->new(
sub {
my $slice= shift;
return undef unless $row < $rowmax;
my $datarow= $table->[++$row];
return [ @{$datarow}[@$slice] ] if $slice;
return $datarow;
},
{
data => $data,
table_idx => 0,
table_ref => \$table,
row_ref => \$row,
rowmax_ref => \$rowmax,
origin => [ 0, $row ],
}
);
}
# If you need to subclass this iterator, don't. Just implement your own.
# i.e. I'm not declaring this implementation stable, yet.
use Data::TableReader::Iterator;
BEGIN { @Data::TableReader::Decoder::Mock::_Iter::ISA= ('Data::TableReader::Iterator'); }
sub Data::TableReader::Decoder::Mock::_Iter::position {
my $f= shift->_fields;
'row '.(1 + ${ $f->{row_ref} });
}
sub Data::TableReader::Decoder::Mock::_Iter::row {
1 + ${ shift->_fields->{row_ref} };
}
sub Data::TableReader::Decoder::Mock::_Iter::dataset_idx {
shift->_fields->{table_idx}
}
sub Data::TableReader::Decoder::Mock::_Iter::progress {
my $f= shift->_fields;
return ${ $f->{row_ref} } / (${ $f->{rowmax_ref} } || 1);
}
sub Data::TableReader::Decoder::Mock::_Iter::tell {
my $f= shift->_fields;
return [ $f->{table_idx}, ${$f->{row_ref}} ];
}
sub Data::TableReader::Decoder::Mock::_Iter::seek {
my ($self, $to)= @_;
my $f= $self->_fields;
$to ||= $f->{origin};
my ($table_idx, $row)= @$to;
my $table= $f->{data}[$table_idx];
my $rowmax= $table? $#$table : -1;
$row= -1 unless defined $row;
$f->{table_idx}= $table_idx;
${$f->{table_ref}}= $table;
${$f->{row_ref}}= $row;
${$f->{rowmax_ref}}= $rowmax;
1;
}
sub Data::TableReader::Decoder::Mock::_Iter::next_dataset {
my $self= shift;
my $f= $self->_fields;
return defined $f->{data}[ $f->{table_idx}+1 ]
&& $self->seek([ $f->{table_idx}+1 ]);
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Data::TableReader::Decoder::Mock - Decoder that returns supplied data without decoding anything
=head1 VERSION
version 0.021
=head1 SYNOPSIS
decoder => {
CLASS => 'Mock',
datasets => [
[ # Data Set 0
[ 1, 2, 3, 4, 5 ],
...
],
[ # Data Set 1
[ 1, 2, 3, 4, 5 ],
...
],
]
}
or
decoder => {
CLASS => 'Mock',
table => [
[ 1, 2, 3, 4, 5 ],
...
],
}
This doesn't actually decode anything; it just returns verbatim rows of data from arrayrefs
that you supply. You can provide one or multiple tables. The 'table' constructor parameter
is an alias for C<< datasets[0] >>.
=head1 ATTRIBUTES
See attributes from parent class: L<Data::TableReader::Decoder>.
=head2 datasets
The verbatim data which will be returned by the iterator. This can be an array of tables, or
one table itself. A table must be composed of arrayrefs, and the cells of the table cannot
themselves be arrayrefs.
=head1 AUTHOR
Michael Conrad <mike@nrdvana.net>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2024 by Michael Conrad.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
